Quote:
Originally Posted by FT_Monk
Isn't the BRZ engine is 13:1 compression? That is eye popping high compression and maybe the reason that stock tune is very rich. Adding methanol/water injection may let you lean out the fuel to make power without punching holes in the piston. Plus it keeps the combustion chamber clean.
|
That being said, this is exactly why adding a meth injection kit to (especially a naturally aspirated vehicle) without a tune to accommodate the additional fuel (because methanol is a fuel, you are effectively enriching the combustion mixture by adding it) would most likely hinder power output. It's not to say that boosted applications don't use it successfully without a tune that optimizes its use, but if you already have an already rich running vehicle and you add fuel, you will lose power.
And to the earlier comment that using methanol has nothing to do with the fuel system because it is added into the intake, this is patently incorrect. Adding fuel to a vehicle, whether it's in the combustion chamber ala direct injection, at the port above the valve or upstream of the throttle is still adding fuel, and without a doubt, methanol is a fuel. And using it to absorb combustion heat certainly does not negate its impact as a fuel.
Now, the concept of running e85 on these engines is entirely more fascinating. I've been dreaming of building a nasty 15:1 N/A engine for a while and running it off of E85/E98 or some other variant of adulterated ethanol for quite some time now.
With the proper tuning solution, e85/e98 could allow for some serious increases in spark timing on the BRZ/FRS, yielding more power. The Mazdaspeed guys have had good success with ethanol based fuels in their direct injected engines as well from what I've seen.
Just my 2 cents.
Jason Griffith
Engineering Director
Nameless Performance, Inc.